Abstract
We constructed a new comprehensive hydro-meteorological observation system to monitor atmosphere-snow-frozen ground interaction in Memuro, Tokachi, Hokkaido in October 2001. The system consists of atmosphere parts (temperature, humidity, wind speed, precipitation, radiation), soil parts (vertical temperature and unfrozen water content profiles, surface soil heat flux etc) and snow parts (snow depth, snow temperature profile, snow water equivalent ). Moreover, we developed new methods for measuring soil water potential under a frozen soil layer by using thermally insulated tensiometers, and for estimating evaporation from bare soil by water balance analysis using soil-moisture profile, rain gauge, and a small lysimeter without needing micrometeorological flux measurements. During the October 2001- October 2002 study period, (1)The soil moisture regime in winter was more dynamic than in other seasons. The minimum soil moisture (unfrozen water content) occurred during soil freezing periods and the maximum soil moisture occurred during snow melt even though winter precipitation was lower than summer precipitation. (2)The evaporation rate from bare in spring was generally higher than that in summer even though the air temperature in spring was lower than in summer. This is because net radiation, soil moisture and wind speeds in spring were higher than those in summer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
